Homebrew PCBs

I saw a site a while back where a guy was using a PCB sensitizing 
spray in a can.  It was from Europe...I can't remember what it was 
called...GPC or something.  You just sprayed it onto a board, 
exposed, developed and etched.  I looked and looked and even emailed 
a bunch of companies to find it, but never did.  I am told it is 
fairly hard to use, as it is said to be tricky to get the right 
uniform thickness of the stuff on boards.
  I'd still like to try it though.  Does anyone know what some of 
these products are called and/or where to find them in the US?

-Josh

Josh,

Try the product made by Electrolube. http://www.electrolube.co.uk/index.shtml

This product has been use in this part of the woods with reasonable success.

I believe it can be obtained in the US from

ECHELON Industries in California.

We buy ours from RS components rswww.com Part # is 198-9657

Do a web search on these company names and you will manage to find the product.

David

At 02:27 PM 19/03/2004, you wrote:
>   I saw a site a while back where a guy was using a PCB sensitizing
>spray in a can.  It was from Europe...I can't remember what it was
>called...GPC or something.  You just sprayed it onto a board,
>exposed, developed and etched.  I looked and looked and even emailed
>a bunch of companies to find it, but never did.  I am told it is
>fairly hard to use, as it is said to be tricky to get the right
>uniform thickness of the stuff on boards.
>   I'd still like to try it though.  Does anyone know what some of
>these products are called and/or where to find them in the US?
>
>-Josh
>
>
>
>Be sure to visit the group home and check for new Bookmarks and files:
>http://groups.yahoo.com/group/Homebrew_PCBs
>Yahoo! Groups Links
>
>
>
>

David Hopkins (VK4ZF)
Queensland
AUSTRALIA
davhop@...
S 27, 22.294  E153, 11.008



[Non-text portions of this message have been removed]

YYEEAAAHHH...that was the stuff: Electrolube PRP200.  Thanks. It 
seems like it would be an easy solution for the quick production of 
accurate boards.   If it is cheap enough, it might be a justifiable 
method.

-Josh

--- In Homebrew_PCBs@yahoogroups.com, David Hopkins <davhop@b...> 
wrote:
> Josh,
> 
> Try the product made by Electrolube. 
http://www.electrolube.co.uk/index.shtml
> 
> This product has been use in this part of the woods with 
reasonable success.
> 
> I believe it can be obtained in the US from
> 
> ECHELON Industries in California.
> 
> We buy ours from RS components rswww.com Part # is 198-9657
> 
> Do a web search on these company names and you will manage to find 
the product.
> 
> David
> 
> At 02:27 PM 19/03/2004, you wrote:
> >   I saw a site a while back where a guy was using a PCB 
sensitizing
> >spray in a can.  It was from Europe...I can't remember what it was
> >called...GPC or something.  You just sprayed it onto a board,
> >exposed, developed and etched.  I looked and looked and even 
emailed
> >a bunch of companies to find it, but never did.  I am told it is
> >fairly hard to use, as it is said to be tricky to get the right
> >uniform thickness of the stuff on boards.
> >   I'd still like to try it though.  Does anyone know what some of
> >these products are called and/or where to find them in the US?
> >
> >-Josh
> >
> >
> >
> >Be sure to visit the group home and check for new Bookmarks and 
files:

> >http://groups.yahoo.com/group/Homebrew_PCBs
> >Yahoo! Groups Links
> >
> >
> >
> >
> 
> David Hopkins (VK4ZF)
> Queensland
> AUSTRALIA
> davhop@b...
> S 27, 22.294  E153, 11.008
> 
> 
> 
> [Non-text portions of this message have been removed]

joshdewinter wrote:
> YYEEAAAHHH...that was the stuff: Electrolube PRP200.  Thanks. It 
> seems like it would be an easy solution for the quick production of 
> accurate boards.   If it is cheap enough, it might be a justifiable 
> method.

Make sure the copper is totally free of oil or the PRP will go
to crap. Water should not bead on the surface.

Make SURE you obtain, read, and understand the Material Data Safety 
Sheet (MSDS). Follow all safety precautions. I considered trying a 
similar product some time back but, after looking at how incredibly 
nasty the stuff was, gave it up. Haven't seen the Electrolube 
product though - be nice to find out that doesn't make you sterile...


--- In Homebrew_PCBs@yahoogroups.com, "joshdewinter" 
<joshdewinter@y...> wrote:
> YYEEAAAHHH...that was the stuff: Electrolube PRP200.  Thanks. It 
> seems like it would be an easy solution for the quick production 
of 
> accurate boards.   If it is cheap enough, it might be a 
justifiable 

> method.
> 
> -Josh
>

--- In Homebrew_PCBs@yahoogroups.com, "joshdewinter" 
<joshdewinter@y...> wrote:
>   I saw a site a while back where a guy was using a PCB 
sensitizing 
> spray in a can.  It was from Europe...I can't remember what it was 
> called...GPC or something.  You just sprayed it onto a board, 
> exposed, developed and etched.   


G C Electronics  now owned by Waldom  website www.gcwaldom.com  They 
make a spray pos. photo resist.    Believe that Kepro use to have a 
neg. photo resist but they are no longer in business.  Right off 
hand I do not know of stocking dealers not a product that I normally 
buy.  Seems this topic was talked about several months ago.

Yes it is not a easy process to get it right, I tried it a long time 
ago and was never pleased with the results, after I think 3 attempts 
I quit, was only having maybe 2 out of 12 boards come out OK. Was 
spending way too much time for what I was getting out of it. 

I believe the best way is to apply resist is a dry film laminate.  I 
think you will find that it is easier to buy the boards already 
presensitized.  I buy the M.G. Chemicals pos. resist boards 600 
series.  They work good.  Good source is Circuit Specialist  
www.circuitspecialist.com  or www.webtronics.com  They carry in 
stock most items needed to make your PCBs as well as other parts.  I 
buy most electronic parts from Mouser Electronics and Allied 
Electronics.  Mouser is starting to carry some PCB materials again 
they had dropped most of it for awhile.  But Circuit Specialist 
currently has better pricing if you are buying 12 or more boards at 
a time.


Ben

Ben